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SubjectRe: [PATCH] Fix preemptible lazy mode bug
Rusty Russell wrote:
> static inline void arch_flush_lazy_mmu_mode(void)
> {
> - PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH);
> + if (unlikely(__get_cpu_var(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU))
> + arch_leave_lazy_mmu_mode();
> }

This changes the semantics a bit; previously "flush" would flush
anything pending but leave us in lazy mode. This just drops lazymode

I guess if we assume that flushing is a rare event then its OK, but I
think the name's a bit misleading. How does it differ from plain

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